7,3,8 are ruled out from the last but one clue
that leaves 0 from the bottom clue but it is in the wrong place
in the middle clue the 0 is still in the wrong place so it must be first and either 2 or 6 is the other correct number
from the top two clues it can't be 6 because it can't be correct and in both the right and wrong place so 2 must be the correct number and from the top clue it must be the left hand digit
that leaves 1 and 4 from the second clue but the missing number is the middle digit so it must be 4 that is correct
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